Apparatus for making cores.



J. GOW. APPARATUS POB MAKING COREE.

APPLIUATION Hum s211129, 1910.

981,257, Patented Jan. 10, 1911.

ff am! gfw UNITED STATES PATENT OFFICE.

JOHN GOW, 0F SCHENECTADY, NEW YORK, ASSIGNOR 0F ONE-HALF T0 ARCHIBALI) M. LOUDON, OF ELMIRA, NEW YORK.

APPARATUS FOR MAKING COBES.

Specicaton of Letters Patent.

Patented Jan. 10, 1911.

Original application filed Hay 20, 1910. Serial No. 562.434. Divided and this application tiled September 28, 1910. Serial No. 584.223.

To all 'whom 'it may concern: D

Be it known that I, Joux (low, a citizen of the United States, residing at Schenectady, in the county of Schenectady and State of New York, have invented certain new and useful Improvements in A paratus for Malcing Cores, of which the fo owing 1s a speellication.

This invention relates to improvements in the methods and means for forming cores for founding purposes; and inv ob]ect 1s to provide an apparatus wherehy the gas vents will be quickly and accurately formed in the two parts of a divided core, to the end that, when the parts are placed togetherthe vents formed therein will register one with the other, and, furthermore, will be positioned in a fixed relation to the peripheral contour of the dividing surface so as to be adapted for application to a paste alpplying a paratus as described in my app cation, Serial No. 562,434 filed May 20th, 1910, of which this is a. divisional application.

I attain my object by construct-ing and applying the apparatus m the manner illustrated in the accompanying drawings, in Which- Figure 1 presents a plan View of a core box with a pair of core arts rammed up in the core molds and havinfr formed there in the gas vents bv means otplny vent forming device, and igs. Q and 3, a plan view and side elevation respectively of the vent forming device.

Like numerals designate like parts in the several views.

To accurately form these vents on the two arts of a core so that, when said parts are astened together, the vents (3, and 8 (as shown in Fig. 1) will accurately register, l construct the core box substantially in the manner illustrated and appl,r thereto, after the core molds have been filled, n vent. forming device such as shown in Fi s. 2 and 3. This device consists of a ske eton frame 4, of wood or metal, provided with crors bars 5, positioned on opposite sides of the frame. Upon these cross bars strips of V- or U-sha )ed cross section are fastened to form the longitudinal and branch vents in the two parts of the cores;

as shown at 6, 7, and 8 on the two cross bars. From these ventformin strips ins 9, 10, and 1l roject, the lengti of sai pins correspondinnP to the depth and contour of the parts of t 1e core into which they will enter. At the center of the frame, and at the opposite sides thereof, ins 12 are provided, said pins being longer t 1an any of the vent forining pins on the cross bars. The core box has the. two parts of the core spaced apart to correspond in distance to the distance between the cross bars 5. After the molds have filled with the core composition, either in a machine or by hand, the print forming frame will be applied bv insertino the pins 12 in sockets 13 provided thereiir in the core box. The frame will then be pressed down, guided into place by the pins 12, until the vent strips and pins have entered into the cores, thus forxnmg simultaneously the vents in both the core parts in position to accurately re ister when the core arts are fastened toget 1er. After tlsvents iavebeen formed the core arts will be removed from the core box an baked in the usual manner. By thus accurately guiding the vent frame into lace over the core molds, the vent channe s will be positioned in the same place relative to the peripheral contour of the dividing surfaces of the core parts, so as to accurately register when the two parts are placed together and so that, when a core part is applied to thc pasting a paratus aforesaid, said vent channels will ihe clear and free from the paste applying passagewavs.

While I have described the application of my invention to a core box containing molds for the two parts of a core, itwill be understood that the rent frame and core box may be so constructed as to form and vent but one coro part at a time, or lo forni and rent more than a single pair of core. parts by simple reduction or multiplication of the requisite parts of thc core box and frame.

Where castings are being made in large quantities, this veul'4 forming apparatus will be found to If reatly simplify und perfectthe making of the cores to say nothing of the time that will obviousl)r be saved in forming the vent channels and holes.

The expense of making the vent frames for diifci'cnt coi-e forni will he slight in] comparison with thc reduction in time und t lnbor cost.

Whitt I claim ns my invcntion :und desire to secure by Letti-rs lzitent is:-

l. The combination, with n core box having unc or more inold for forming the parts of u core, of u frame provided with vent forming projections arranged in accordance with thc number and shape of the molds, and means on the box and frame for guiding thc frame into position over the mold or molds, whereby vents will be impressed in the joint surfaces of the core parts after the mold or molds are filled in fixed relation i to the peripheral contour of said surfnces und in position to register with one :mother when the parts :1re fastened together.

.f. 'llw combination, with a core liox halving om nr more molds for forming thc parte ot' n vom, of :i frame provided with vent forming interconnected strips having vent. forming pins lnojccting vertically therefrom arranged in accordance with the numln-.r und shape ot thc molds, the frame bein fin-thor lln'ovidcd with vertical guide pins o greater cngth than the vent. pins, and the core box being provided with guide channels to receive Suid guide pins.

[n tcstiniony whereof I have nixed my signature, 1n presence of two witnesses.

JOHN GOW.

Witnesses z SAMUEL H. PERRAULT, J. H. MEEHAN. 

